I'm not sure if this feature would be possible since it's related to a plug-in, but it'd be a convenient feature -- after my phone switched to .HEIC instead of .JPG files for photos, the "Date/Time Original" information from ExifTool is the only way for me to know when a picture was actually taken. Right now I can view .HEIC files in XnView MP (using the plugin), but the "EXIF Date" column is empty, and I have to click on Info->ExitTool->[scroll down to EXIF section] in order to get this information, picture by picture, which is rather slow.